I tried making a line of notes in the piano roll and they sounded perfect, then when I went to a different track and created a chord with the same note arrangement they sounded weird. I don't know if I'm explaining this correctly since as I've mentioned before I'm not musically inclined, but hopefully someone gets the idea. Basically it sounds fine at first, then the notes scrambled at certain points in a measure. I know I'm putting the notes in correctly because they're copied just 2 keys down and spaced exactly the same distance apart. I got frustrated and closed the program so I can't tell you where I placed the notes, but maybe someone gets the picture.
Weird how? A chord is 'noisier' than a single tone, so a track that works fine in mono might 'clip' when you play chords. In this case the solution is to lower the volume or adding a compressor/limiter....they sounded weird...
Also:
https://sourceforge.net/apps/phpbb/lmms ... ?f=7&t=569
In this case try and drag one of the notes that doesn't sound good and see if there is another note hiding underneath it.